Blackcat Airsoft 25/30mm Dual Scope Mount with Angle Indicator

Blackcat Airsoft 25/30mm Dual Scope Mount with Angle Indicator The red needle moves with your rifle and displays a number that indicates the percent your rifle is off level Multiply the indicated percent by the target distance to easily calculate the adjusted distance for gravity. Green Color Bubble Level For Anti-cant - make sure your scope is absolutely level Suitable for any scope of 25mm / 30mm diameter Fit to mount on any 20mm picatinny Rail System